Electrical Properties and Chemical Resistance of the Composites (1-x)Gd2Zr2O7•xMgO in Li-Containing Chloride Melts

被引：0

作者：

Anokhina, Irina ^{[1
]}

Animitsa, Irina ^{[1
]}

Erzhenkov, Maxim ^{[1
]}

Voronin, Vladimir ^{[1
,2
]}

Kadyrova, Nadezhda ^{[3
]}

Zaikov, Yuri ^{[1
]}

机构：

[1] Inst High Temp Electrochem Ural Branch Russian Aca, Ekaterinburg 620990, Russia

[2] Inst Met Phys Ural Branch Russian Acad Sci, Ekaterinburg 620108, Russia

[3] Ural Branch Russian Acad Sci, Inst Solid State Chem, Ekaterinburg 620990, Russia

来源：

PROCESSES | 2023年 / 11卷 / 04期

关键词：

composite; pyrochlore; gadolinium zirconate; Gd2Zr2O7; oxide ion conductivity; chemical stability in Li-containing halide melts; ELECTROCHEMICAL REDUCTION; THERMAL-EXPANSION; ION-TRANSPORT; PYROCHLORE; LITHIUM; CONDUCTIVITY; LI2ZRO3; URANIUM; ZIRCONATE; CERAMICS;

D O I：

10.3390/pr11041217

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Composites of (1-x)Gd2Zr2O7 center dot xMgO were prepared by mixing gadolinium zirconate with freshly precipitated Mg(OH)(2) followed by heat treatment at 1500 degrees C. Small concentrations of magnesium oxide dissolved in the complex oxide matrix of Gd2Zr2O7. This led to decrease in the lattice parameters of the matrix phase and a complex redistribution of Gd and Zr over the A and B sublattices. According to the impedance spectroscopy results of the studied samples, for (1-x)Gd2Zr2O7 center dot xMgO (x = 0.05, 0.07, 0.10), the ionic conductivity was slightly higher than that for the undoped Gd2Zr2O7. The share of dominant ion transport did not change upon doping with magnesium oxide. The composites showed chemical resistance in a lithium halide (LiCl) melt and interacted with LiCl-xLi(2)O (x = 2 wt.%, 4 wt.%) melts at 650 degrees C with the formation of a Gd2O3 phase or a mixture of phases (Gd2O3, Li2ZrO3, ZrO2, LiGdO2, or LiGdCl2) on the ceramic surface, respectively.

引用

页数：16

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